296 



TIIK !>llM-:<T-(Ti;i;KXT MOTOR 



Connecting rod, use of, 120 

 Conservation of Energy, principle 



of, 22 



Constant, cuirent motors, 120 

 Control, series-parallel, 192, 196, 



200, 221, 231, 247 

 Controller, irregular handling of, 



196, 253 



Core, losses in, 139, 145 

 Coupled motors : 



shunt-wound, 72 



series- wound, 104 

 Coupling, elastic, for starting, 159 

 Crane, design of motor for, 226 

 Crane-stage, design of motor for, 



57, 154 

 Crocker- Wheeler motor, 130 



DBAW BAR, force exerted at, 29, 55 

 Drum winding, 7 



ECONOMY of working railway motors, 



258 



Eddy currents, 28, 129 

 Edison dynamo, torque curve of, 9 

 Efficiency of conversion, 123 



mechanical, 125 



of motors on : 



Baltimore and Ohio Kailroad, 

 128, 211 I 



Chicago Metropolitan Elevated 

 Kailroad, 250 



Buffalo and Niagara Falls Elec- 

 tric Railway, 99, 127 



total, 132 



of Crocker-Wheeler motor, 



130 



of G. E. 800 motor, 138 



of Westinghouse motor, 140 

 Effort, useful, 55 



Elastic coupling, 159 

 Energy, principle of the conserva- 

 tion of, 22 



kinetic, of rotating shaft, 157 



of moving train, 244, 257, 258 ' 

 Ewing, Professor, researches of, 27 

 Excitation of magnets, loss due to, i 



134 



FI.KMINCI'S llulcs, 43, 266 

 Force factor defined, 169 

 Four-pole dynamos, weights of, 



178, 180 



Friction, error in torque test due 

 to, 9 



loss in motor due to, 129, 138 



of shafting, 50 



train, from tests on : 

 Baltimore and Ohio Railroad, 



211 



Chicago Metropolitan Elevated 

 Railroad, 250 



City and South London Railway, 

 164 



Liverpool Overhead Railway, 

 216 



Buffalo and Niagara Falls Elec- 

 tric Railway, 203 



GAP, air, magnetisation in, 281 



permeance of, in railway 



motor, 238 

 Gear wheel, definition of, 49 



number of teeth in, 50, 59 

 Gearing, loss due to use of, 138 



single reduction, use of, 58 

 Generators, railway, weights of, 



180 

 Grade at station exits, 168 



series- wound motor descending, 



101 



force required to start on, 179, 



174 



speed ascending, 119 



HEAT DROP, defined, 15 



correction for, in finding M, 

 17 



energy expended in, 20 



and work, distinction between, 



24 



Hoisting machinery, equation for 

 M in, 52 



use of worm gearing in, 58 



Hopkinson's method of testing, 84 

 Horse-power, maximum possible, 

 32,51 



